package com.codewater.springcloud.controller;

import com.codewater.springcloud.entities.CommonResult;
import com.codewater.springcloud.entities.Payment;
import com.codewater.springcloud.lb.LoadBalancer;
import lombok.extern.slf4j.Slf4j;
import org.springframework.cloud.client.ServiceInstance;
import org.springframework.cloud.client.discovery.DiscoveryClient;
import org.springframework.http.ResponseEntity;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RestController;
import org.springframework.web.client.RestTemplate;

import javax.annotation.Resource;
import java.net.URI;
import java.util.List;

/**
 * @author ： CodeWater
 * @create ：2022-07-14-20:15
 * @Function Description ：
 */
@RestController
@Slf4j
public class OrderController {
//    url写死
//    public static final String PAYMENT_URL = "http://localhost:8001";
//    动态获取应用名称
    public static final String PAYMENT_URL = "http://CLOUD-PAYMENT-SERVICE";
    
    @Resource 
    private RestTemplate restTemplate;
    
    @Resource 
    private LoadBalancer loadBalancer;
    @Resource 
    private DiscoveryClient discoveryClient;
    
    
    @GetMapping("/consumer/payment/create")
    public CommonResult<Payment> create(Payment payment){
        return restTemplate.postForObject( PAYMENT_URL + "/payment/create" , payment , CommonResult.class );
    }
    
    @GetMapping("/consumer/payment/get/{id}")
    public CommonResult<Payment> getPayment(@PathVariable("id") Long id){
        return restTemplate.getForObject( PAYMENT_URL + "/payment/get/" + id , CommonResult.class );
    }
    
    @GetMapping("/consumer/payment/getForEntity/{id}")
    public CommonResult<Payment> getPayment2(@PathVariable("id") Long id){
        ResponseEntity<CommonResult> entity = restTemplate.getForEntity( PAYMENT_URL + "/payment/get/" + id , CommonResult.class );
        
        if( entity.getStatusCode().is2xxSuccessful() ){
            log.info( "======getForEntity:  " + entity.getHeaders().toString() );
            return entity.getBody();
        }else{
            return new CommonResult<>( 444 , "操作失败" );
        }
        
    }
    
    @GetMapping("/consumer/payment/lb")
    public String getPaymentLB(){
        List<ServiceInstance> instances = discoveryClient.getInstances( "CLOUD-PAYMENT-SERVICE" );
        if( instances == null || instances.size() <= 0 ){
            return null ;
        }
        
        ServiceInstance serviceInstance = loadBalancer.instances(instances);
        URI uri = serviceInstance.getUri();
        
        return restTemplate.getForObject( uri + "/payment/lb" , String.class );
    }

    // ====================> zipkin+sleuth
    @GetMapping("/consumer/payment/zipkin")
    public String paymentZipkin()
    {
        String result = restTemplate.getForObject("http://localhost:8001"+"/payment/zipkin/", String.class);
        return result;
    }
}
